Inner tube 20 x 1 3/8 hutchinson

How to choose the right 20x1 3/8 inner tube for your bike

When it comes to bicycle maintenance, the inner tube is often overlooked, yet it plays a key role in ensuring good road handling, optimal comfort, and maximum safety. Among the many available sizes, the 20x1 3/8 inner tube is a specific option designed for certain types of bikes. Let’s take a closer look at its features, specifications, and how to choose the right one.

What does 20x1 3/8 mean ?

The size 20x1 3/8 refers to the English sizing system (ETRTO 37-451), indicating a tire with a 20-inch outer diameter and a 1 3/8-inch width. This size is commonly used on:

• Folding bikes,

• Some high-end kids' bikes,

• And certain mobility or specialty bicycles.

It's important not to confuse this size with similar ones like 20x1.75 or 20x1.95, which are not interchangeable due to different internal rim diameters.

Technical features of a 20x1 3/8 inner tube

The 20x1 3/8 inner tube is defined by:

• A 451 mm internal diameter, matching specific rim sizes.

• Compatibility with narrow tires, often found on compact or city bikes.

• Valve options such as Schrader (car-type) or Presta (thin, high-pressure), depending on your rim.

• Construction from butyl rubber, known for durability and airtightness. Some high-performance models use latex for added flexibility and lightness.

Why the right inner tube matters

Using the wrong inner tube can lead to:

• Increased risk of punctures,

• Poor tire performance and road grip,

• Mounting difficulties,

• Premature wear on the tire or rim.

The 20x1 3/8 inner tube must perfectly match your bike tire’s dimensions to ensure proper pressure, shock absorption, and stable wheel behavior.

Mounting tips & maintenance

To extend the lifespan of your inner tube:

• Regularly check the tire pressure (usually printed on the sidewall),

• Inspect the tread and bead of the tire,

• Use proper tire levers to avoid pinching the tube during installation,

• Always carry a spare inner tube when cycling regularly or over long distances.

In summary

The 20x1 3/8 inner tube is a specific component designed for bikes with small wheels but larger rim diameters than standard 20-inch tires. Choosing the right model with the proper valve type and high-quality material ensures reliable performance and riding comfort.

Looking for a 20x1 3/8 inner tube that’s durable and easy to install? Check out our range of compatible models and enjoy smooth, worry-free cycling !